package com.spring;

import com.zhn.service.UserServiceImpl;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

@Component
public class ZhnBeanPostProcessor implements BeanPostProcessor{
    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) {
        System.out.println("初始化前");
        if(beanName.equals("userService")){
            ((UserServiceImpl)bean).setName("张浩楠");
        }
        return bean;
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) {
        System.out.println("初始化后");
        if(beanName.equals("userService")){
            Object proxyInstance = Proxy.newProxyInstance(ZhnBeanPostProcessor.class.getClassLoader(), bean.getClass().getInterfaces(), new InvocationHandler() {
                @Override
                public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                    System.out.println("代理逻辑");
                    return method.invoke(bean, args);
                }
            });
            return proxyInstance;
        }
        return bean;
    }
}
